Two isomers are not interchangeable. • Carbon 2 & 3 joined by double bond. • No free rotation. • Bonds would have to be broken and reformed. • +270 kJ mol-1 energy needed to break this bond. • Insufficient energy available at room temperature.

cis. .. • Different names needed to identify isomers. • Substituent groups on the same side of double bond.

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Unformatted text preview: • Cis but-2-ene Cis but-2-ene ...and trans . • “ trans ” means other side or cross over e.g. trans Atlantic, transplant, trans…. .! • Substituents on opposite sides of double bond. trans but-2-ene Different compounds- different properties. Time to think and apply what we have learned! • How are the structures of nerol and geraniol related? • How many moles of H 2 would be needed to saturate one mole of geraniol? • How are nerol and geraniol related to citronellol? • How are the structures of nerol and geraniol related to linalool?...
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